Chemical closets

ABSTRACT

A flushing unit for a chemical closet comprises a reservoir for flushing fluid and means for circulation of flushing fluid between the reservoir and a lavatory pan or bowl of a chemical closet. Provision is made so that the return conduit from the lavatory pan to the reservoir will not admit at any time solid material deposited in the lavatory pan. Passage of liquid deposited in the lavatory pan therefrom to the reservoir is generally prevented by ensuring that the return conduit is incapable of allowing the free flow therethrough of liquid except during transfer of flushing fluid to the lavatory pan or chamber. The return conduit can take the form either of a narrow bore tube through which liquid can only be passed under suction, or can be of wider bore having a suitable valve therein.

This invention relates to chemical closets.

Transportable chemical closets which comprise a lavatory pan or bowl,the lower part of which can communicate with a container for a chemicalsolution, are already known. Since a piped supply of water is notgenerally available to effect flushing of the lavatory pan,recirculating units have been devised which, when the contents of thelavatory pan have passed into the lower part of the container, drawfluid from the container, wash it around the lavatory pan to removeadhering waste material therefrom and return it to the container orreservoir. A disadvantage of such an arrangement is that the fluid beingrecirculated gradually becomes more and more contaminated, carrying anincreasing amount of solids in suspension, so that a stage is reached atwhich the fluid being recirculated tends to foul the lavatory pan ratherthan flush it clean.

It is an object of the invention to provide a transportable chemicalcloset which is more sanitary and hygenic then similar apparatushitherto generally in use and wherein the flushing thereof will begreatly facilitated.

.[.According to one aspect of the present invention, there is provided aflushing unit for a transportable chemical closet comprising, incombination, a reservoir for a flushing fluid, means for delivery offluid from the reservoir to the lavatory pan or bowl of the closet toeffect flushing thereof and conduit means to the reservoir to enable, inuse, flushing fluid to be returned from the lower part of the lavatorypan or bowl to the reservoir, which conduit means is so adapted thatsolid waste material deposited in the lavatory pan or bowl is unable topass therethrough to the reservoir..].

According to .[.a second.]. .Iadd.one .Iaddend.aspect of the invention,there is provided a transportable chemical closet comprising a casingadapted to provide a container for a chemical solution, a lavatory panor bowl located within the casing at the upper part thereof and having adischarge aperture at its lower part, closure means for the dischargeaperture and a flushing unit which comprises a reservoir for a flushingfluid, means for delivery of fluid from the reservoir to the lavatorypan or bowl of the closet to effect flushing thereof and conduit meansto the reservoir to enable, in use, flushing fluid to be returned fromthe lower part of the lavatory pan or bowl to the reservoir, whichconduit means is so adapted that solid waste material deposited in thelavatory pan or bowl is unable to pass therethrough to the reservoir..Iadd.

According to a second aspect of this invention, there is provided asanitary closet comprising

a. a bowl portion having a bottom outlet,

b. a waste receptacle positioned below said bowl for receiving liquidand solid waste admitted to said bowl and passing through said bottomoutlet,

c. closure means operable between open and closed positions forselectively permitting solid and liquid waste to pass from said bowl tosaid waste receptacle,

d. means defining a separate reservoir for flushing fluid, saidreservoir being positioned above said bowl outlet and around said bowlportion,

e. sump means positioned below said bowl outlet and about said wastereceptacle for collecting flushing fluid when said closure means isclosed,

f. means defining a separate flow path for said flushing fluid from saidbowl to said sump when said closure means is in a closed position,thereby bypassing said waste receptacle,

g. pump means for forcing said fluid from said reservoir to said bowl toflush said bowl, said means also defining a separate flow path to returnsaid flushing fluid from said sump to said reservoir. .Iaddend.

The closure means serves the dual function of obviating the incidence ofunpleasant sights and smells at all times other than when it is desiredto transfer the contents of the lavatory pan or bowl to the chemicalsolution, while preventing loss of flushing fluid into the containerwhen flushing of the lavatory pan or bowl is being effected. The closuremeans can, for example, take the form described in British Pat. No.1,034,650, and comprise a spring or weight loaded flap carried by ashaft which extends transversely of the container and which is supportedfor angular movement about its longitudinal axis. An actuating lever orhandle is disposed externally of the casing so that appropriate angularmovement can be imparted to the shaft to move the flap into an openposition such that discharge of matter from the pan or bowl into thecontainer can take place.

The flushing unit .Iadd.of the closet .Iaddend.of the present invention.Iadd.is generally located at a position around the lavatory pan or bowland .Iaddend.will be operated after the contents of the lavatory pan orbowl have passed therefrom, generally to a container of the aforesaidtype containing a chemical solution. The conduit to the reservoir forthe flushing fluid from the lavatory pan or bowl must be so designedthat solid material deposited in the lavatory pan, in particular faeces,will not be able to enter thereinto during use of the chemical closet.Hence, if as according to one embodiment of the present invention, theconduit has a relatively wide bore, a valve can be provided thereinwhich is only opened when flushing is to be carried out, at which timethe closure means will be kept closed. In such a case, operation of themeans for delivery of the flushing fluid from the reservoir, the meansgenerally being a pump, and operation of the valve means areadvantageously synchronised with respect to one another so that thevalve is only in the open position during operation of the deliverymeans, so that waste material, and in particular solid material, cannotever escape into the reservoir. Furthermore, in such a case operation ofthe delivery means preferably can only take place when the valve is openso that overfilling of the lavatory pan or bowl cannot occur.

According to a further embodiment of the present invention, the use of avalve to prevent entry of waste material into the reservoir for flushingfluid can be dispensed with if the conduit means has such a narrow borethat only liquid can pass therethrough and entry of liquid thereinto isonly possible when suction is applied to the end of the conduit meansremote from the lavatory pan or bowl.

Since with a narrow bore conduit, there will be a tendency for arelatively large proportion of flushing fluid to be lost from thelavatory pan or bowl by seepage around the closure means, in comparisonto the amount which enters the conduit means, it is proposed that whenthe flap or other closure means is in place, sealing of the dischargeaperture should be achieved by rubber or other elastomeric sealingmeans. Such sealing means can take the form of a membrane in which casethe closure flap can be dispensed with if the membrane is sufficientlystrong to serve as a base portion of the lavatory pan or bowl. If aclosure flap is employed, the sealing membrane will both close thedischarge aperture and provide a seal around the flap in the region ofthe perimeter of the discharge aperture. Such a sealing membrane isgenerally disposed around a ring preferably of U-shaped section.Iadd.constituting a small sump positioned below the bowl outlet.Iaddend.so that when the ring is forced into the discharge aperture bythe closure flap or other means acting on the sealing membranearrangement, the discharge aperture will be sealed off from the chemicalsolution in the container below the lavatory pan or bowl.

The flushing fluid will generally contain an additive so that it willalways be sterile. Such additive can for example be the same as thechemical component of the chemical solution in the container below thelavatory pan or bowl. The component members of the chemical closet, andin particular the sealing means should be made of a material which isresistant to attack by waste products deposited in the lavatory pan orbowl. In particular, the sealing means should be resistant to attack byammonia.

In order that the invention may be clearly understood and readilycarried into effect, reference will now be made, by way of example only,to the accompanying drawings in which:

FIG. 1 is a diagrammatic plan view of one flushing arrangement.[.according to the present invention.]. for use with a chemicalcloset.[.;.]. .Iadd.according to the present invention; .Iaddend.

FIG. 2 is a diagrammatic longitudinal sectional view through theflushing arrangement shown in FIG. 1;

FIG. 3 is a section on the line A--A in FIG. 2;

FIG. 4 is a diagrammatic sectional view of a chemical closet.[.embodying a second flushing arrangement.]. according to theinvention.[., and.]. .Iadd.comprising a second flushing arrangement, and.Iaddend.

FIG. 5 is a diagrammatic sectional view of part of the chemical closetof FIG. 4 showing the arrangement of component members when the flushingarrangement is in use.

Referring to FIGS. 1 to 3 of the drawings, 10 denotes a lavatory panseparated from a flushing unit denoted generally as 11 by a transversepartition 12 which divides an outer casing (not shown) into a forwardcompartment containing the lavatory pan 10 and a compartment whichcontains the flushing unit 11. The space in the forward compartmentbelow the lavatory pan 10 will serve as a container for a chemicalsolution which is of such a nature as to sterilise and liquefy or causeemulsification of matter discharged thereinto. The solution employedwill preferably consist of an admixture of chemicals in flake or otherappropriate form, such chemicals being put into solution in anappropriate amount of water. An example of a suitable composition forthis purpose is that which forms the subject of U.K. Pat. No. 1,114,808.A discharge aperture will generally be provided on the underside of thelavatory pan 10, normally being closed, but which can be opened whenrequired to allow discharge of waste material into the chemical solutionin the lower part of the forward compartment. The flushing unit 11comprises a reservoir 13 which is provided with a cover member 14, boththe reservoir 13 and the cover member 14 advantageously being made of asynthetic plastics material such as polyethylene in order that the rimof the reservoir may enter into snap-fitting engagement with the rim ofthe cover member in the manner shown in FIG. 2 of the drawings. Anangled tube 15 which can also be formed of a synthetic plastics materialjoins a lower region of the lavatory pan 10 with the interior of thereservoir. One limb 15a of the tubular member 15 is mounted about anaperture 16 in the lower region of the lavatory pan 10, and passesthrough an aperture in the partition 12 in which it is held by a sealingmember 17. A limb 15b of the tubular member 15, which lies within therear compartment, is at right-angles to the limb 15a and enters into thereservoir 13 through the cover member 14, the hole in the cover memberthrough which the limb 15b passes being sealed by a sealing ring 15c.The cover member 14 is also pierced by two supply ducts 18 to a pump 19mounted on the upper surface of the cover member 14. The pump isprovided with an outflow pipe 20 (FIG. 1) which can also be formed of asynthetic plastics material, for example polyethylene, and through whichthe contents of the reservoir can be passed to the lavatory pan or bowlto flush the same.

A valve plate 21 closes the aperture 16 in the lower region of thelavatory pan 10. A sealing ring 22 is provided around the circumferenceof the valve plate 21. The valve plate 21 mounts a rod 23 which isaxially disposed in the limb 15a of the tubular member 15, in which itis displaceable to effect opening and closing of the aperture 16. Therod 23 passes through a side limb 15d of the tubular member 15, the sidelimb 15d being colinear with the limb 15d and engaging a tubularprojection 24 mounted on a transverse wall of a casing 25 of a switchmechanism shown generally at 26. The rod 23 passes from the side limb15d into the projection 24 and through the wall of the switch mechanism.The engagement of the side limb 15d and the tubular projection is suchthat fluid in the limb 15d cannot escape at the joint produced.Likewise, the fit of the rod 23 with a hole in the transverse wall ofthe casing 25 is such that fluid cannot enter the switch mechanism fromthe side limb 15d.

The switch mechanism consists of a vertically displaceable rod 27 whichis provided with a knob 27a and which passes through the top of thecasing 25. At the base of the rod 27 is a constant 28 which, when theknob 27a is fully depressed completes the circuit of a mercury switch 29which can be connected to a car battery. The mercury switch 29 isconnected to the motor of the pump 19 by wires 30. The rod 27, and hencethe contact 28, is normally biased away from the mercury switch by meansof a compression and torsion spring 31 which surrounds the rod in anupper region thereof, being housed in a compartment 32 in an upperregion of the casing 25. About the middle of the rod 27 is mounted a cam33 which is so disposed on the rod 27 that when the spring 31 holds thecontact 28 apart from the terminals of the mercury switch 29, theprojection of the cam will be level with, but at an angle to the axis ofthe rod 23 which projects into the housing 25. Within the confines ofthe casing 25, a plate 34 is mounted on the rod 23, being biased fromthe transverse wall of the casing 25 by a spring 35. The plate 34 is sodisposed with respect to the cam 33 that rotation of the cam will causethe projection thereof to abut the reverse side of the plate 34 to thatwhich contacts the rod 23, the reverse side of the plate 34 being shownin the drawing to be domed, and hence force the plate against the actionof the spring 35 which will be compressed and hence cause axialdisplacement of the rod 23 in the limbs 15a and 15d of the tubularmember 15 to open the aperture 16 in the lower part of the lavatory pan10.

In order to operate the flushing unit 11, it is necessary to firstensure that the discharge aperture communicating the lower part of thelavatory pan 10 with the lower region of the forward compartment isclosed. The knob 27a is then depressed so that the contact 28 completesthe circuit of the mercury switch, and the pump 19 is then actuated,sterile fluid from the reservoir 13 being drawn through the supply ducts18 by the pump which passes the sterile fluid through the outflow pipe20 to the lavatory pan 10. In order to release sterile fluid which hasentered the lavatory pan 10, the knob 27a should be given a turnsufficient to cause the cam 33 to abut the plate 34 and cause axialdisplacement of the rod 23 in the tubular member 15, thus opening theaperture 16. It is preferable that the opening of the aperture 16 becarried out simultaneously with actuation of the pump 19 in order toavoid overfilling of the lavatory pan 10 with sterile fluid. Whenflushing is complete, it is simply necessary to return the knob to itsneutral position to stop operation of the pump. The torsion of thespring will cause the cam 33 to rotate and hence out of abutment withthe plate 34, thus closing the aperture 16 against undesirable entry ofwaste material subsequently deposited in the lavatory pan 10.

Referring next to FIG. 4 of the accompanying drawings, 110 denotes anouter casing which is appropriately shaped and dimensioned so that whilesuitable for the purpose in view it will also be completely stable whenplaced on a floor or other surface. The casing is divided by means of aninternal transverse partition 111 into a relatively large forwardcompartment 112 and a smaller rear compartment 113. A lavatory pan orbowl 114 is located in the upper part of the forward compartment 112,the space in the latter below such pan being adapted to serve as areservoir for a chemical solution of the type hitherto described for usein the forward compartment below the lavatory pan 10 of the chemicalcloset part of which is shown in FIGS. 1 to 3. The aforesaid pan 114 isprovided at its lower part with a discharge aperture .Iadd.114a.Iaddend.which is normally closed by means of a flap 115, the latterbeing disposed below the underside of the pan. The closure flap 115which is conveniently of convex or part-spherical form as shown iscarried by a shaft 116 the level of which in the casing 110 is belowthat of a sealing ring 117 of U-shaped section which carries a doublemembrane .Iadd.and forms a small sump below the level of the bowl outletor discharge aperture 114a.Iaddend.. The shaft 116 extends transverselyof the forward compartment and is so supported as to be capable ofangular or pivotal movement about its longitudinal axis. The sealingring 117 is supported in the casing 110 so that it is free to move in avertical direction towards and away from the lavatory pan or bowl 114.One end of the shaft 116 will project through a side wall of casing 110and will be provided at such end with an actuating lever or handle (notshown), the arrangement being such that on appropriate operation of saidlever or handle, the closure flap 115 will be moved from the openposition shown to a position where, together with the sealing ring 117,it effectively closes the aperture in the pan 114. On actuation of thelever or handle in the opposite direction, the flap 115 and ring 117will be removed from the vicinity of the aperture in the pan 114 so thatany matter present in the pan will be discharged into the underlyingreservoir under the action of gravity. The closure flap 115 will beappropriately loaded by means of a spring or weight so that upon releaseof the actuating lever, the flap will be restored automatically from theopen position to the closed position.

At its lower part the partition 111 is provided with a dischargeaperture, there being a discharge pipe 118 which leads from saidaperture across the lower part of the rear compartment 113 and outthrough the rear wall of the latter. Disposed in the discharge pipe is acontrol valve for controlling the flow of effluent from the reservoir.Although various types of control valves can be employed, in thechemical closet illustrated, the control valve comprises a flat plate119 which is so arranged as to be capable of sliding movement back andforth in a plane transverse to the discharge pipe 118 from a closedposition where it will effectively prevent flow through the latter to anopen position wherein flow will take place and vice versa. In thechemical closet illustrated, the plate 119 is attached to the lower endof a tube 120 which is internally screw-threaded.

Engaging in the screw-thread tube 120 is a threaded rod 121 whichextends upwardly through a lid or cover at the top of the rearcompartment 113. At its upper end the threaded rod 121 is convenientlyprovided with an actuating handle 122, the arrangement being such thatrotation of the rod in one direction or the other will result inmovement of the valve from its closed to its open position and viceversa.

In view of the possibility that the constituents of the chemicalsolution in the reservoir may tend to settle or separate out, it isadvantageous to provide means for effecting periodical agitation of thecontents of the reservoir. With that end view, a blade or paddle-likedevice 115a which is associated with the flap 115 extends into thereservoir for chemical solution, the arrangement being such that on eachmovement of the closure flap 115 the blade or paddle 115a will beeffective to stir or agitate the contents of the said reservoir.

In order that the chemical closet should be flushed clean of anyresidual waste material, in particular solid material remaining on theinternal wall of the lavatory pan 114, there is provided according tothe present invention a flushing arrangement comprising a reservoir 123which is .Iadd.located at a position around the lavatory pan or bowl 114and .Iaddend.provided with a closure member 124. The reservoir 123, thecapacity of which can be from 2 to 4 imperial pints, should be mountedat a height at least equivalent to the height of the lavatory pan orbowl 114. Because of the relatively small size thereof, it can forconvenience of access be simply .Iadd.a separate container.Iaddend.hooked onto the outside of the casing 110 at any position aboutthe perimeter thereof which is found to be convenient. Two orifices areprovided in the wall of the reservoir 123 at different heights. Into thelower orifice is fitted a narrow bore polyethylene tube 125 which passesto one or more nozzles 127 mounted in an upper part of the wall of thelavatory pan 114. The upper orifice of the reservoir 123 is providedwith a similar flexible narrow bore polyethylene tube 126 which passesthrough the casing 110 to the .Iadd.sump-forming .Iaddend.groove of theU-shaped sealing ring 117 around which it is coiled. The part of thetube 126 which is coiled around the sealing ring 117 is provided with anumber of holes in the wall thereof. A tap 128 is provided in the baseof the reservoir 123 in order that liquid may be run off therefrom fromtime to time when it is desired to replenish the flushing liquid in thereservoir.

The flexible tube 125 leading to the nozzle(s) 127 is formed in twoparts connected through a pump 129 which is connected through leads to aswitch 130 which can be connected to a car battery. The switch 130 isadvantageously of such a type that when depressed, it will remain in adepressed position for a fixed period of time sufficiently to achievethe desired flushing operation.

In order to operate the flushing arrangement shown in FIG. 4, it isfirst necessary to ensure that the discharge aperture communicating thelower part of the pan 114 with the lower region of the forwardcompartment is closed. The discharge aperture will then be sealed in themanner shown in FIG. 5. The switch 130 is then actuated and the pump 129is set in motion so that water is withdrawn from the reservoir 123 andsprayed around the lavatory pan 114. The sprayed flushing fluid flushesthe wall of the lavatory pan and descends to the region of theperforated part of the tube 126. Owing to the withdrawal of fluid fromthe reservoir 123, a vacuum is produced in the upper region thereof andas soon as the level of flushing fluid drops below the level of theupper orifice, flushing fluid in the lavatory pan can be withdrawn bysuction through the tube 126 into the reservoir 123 where it replenishesthe flushing fluid therein. In this way a continuous circulation offlushing fluid can be achieved for as long as desired. It is importantthat during such flushing operation a good seal is maintained in theregion of the discharge aperture of the lavatory pan in order thatseepage of flushing fluid should be reduced to the minimum. Likewise,the various apertures in the wall of the reservoir 123 should beair-tight. By the use of the narrow bore tube 126, it is impossible forfluid to pass therethrough unless under suction and therefore althoughthe apertures will always be exposed to the contents of the lavatorypan, fluid will only pass therethrough during the flushing operation.

The flushing fluid employed in the flushing arrangements hithertodescribed will generally be made sterile by addition thereto of achemical solution of a sterilising agent. The life of this sterileflushing fluid thus produced will be considerably longer than that of asterile fluid containing discharged waste material hitherto used asflushing fluid. When it is considered that the flushing fluid in thereservoir therefor has become sufficiently contaminated to require itsdisposal, it is simply necessary to discharge the sterile fluid from thereservoir therefor in a suitable manner and refill the reservoir withfresh sterile fluid. In the embodiment shown in FIG. 4, it is not evennecessary to remove the reservoir from the chemical closet for thispurpose. A chemical solution of a sterilising agent can be added to thecontents of the flushing fluid reservoir from time to time if desired.

A flushing arrangement such as indicated above will be sanitary andhygenic and as compared with flushing units for other chemical closetshitherto in use, the effectiveness of flushing will be greatly enhanced.

I claim:
 1. A transportable chemical closet comprising a casing forcontaining a chemical solution in a lower region thereof, a lavatory panor bowl located within said casing at an upper region thereof and havinga discharge aperture at its lower part, closure means for said dischargeaperture, said closure means being constrained to keep said dischargeaperture closed at least when said pan or bowl is in use, and a flushingunit comprising a casing constituting a chamber for a flushing fluid,means defining an inlet passage to said chamber from a lower region ofsaid pan or bowl, means defining an outlet passage to said pan or bowlfrom said chamber, means associated with said outlet passage forwithdrawing the flushing fluid from said chamber through said outletpassage to said pan or bowl, said inlet passage being adapted so thatsolid waste material as is normally deposited in a lavatory pan or bowlcannot pass therethrough and so that liquid can only pass therethroughwhen said fluid withdrawing means is operating, when, with said closuremeans closed, the flushing fluid is circulated in a closed flow pathwhich includes said pan or bowl and bypasses said lower region of thecasing.
 2. The transportable chemical closet as defined in claim 1,wherein said casing of the flushing unit has two apertures at differentheights therein, first narrow-bore conduit means from the lower aperturedefining said outlet passage and a further narrow-bore conduit means tothe upper aperture defining said inlet passage, the bore of said furtherconduit means, at least in said lower region of the pan or bowl, beinginsufficient for liquid to enter thereinto other than when suction isapplied to said further conduit means, said flushing unit furthercomprising nozzle means attached to said first conduit means at alocation thereon within said pan or bowl.
 3. The transportable chemicalcloset as defined in claim 2, further comprising sealing means for saiddischarge aperture, for sealing the latter when said closure meanscloses said discharge aperture.
 4. The transportable chemical closet asdefined in claim 1, wherein said means defining the inlet passagecomprises a tube having a bore allowing the passage of liquidtherethrough substantially only by suction produced at the other endthereof by withdrawal from said chamber of the flushing fluid throughsaid means defining the outlet passage.
 5. The transportable chemicalcloset as defined in claim 4, further comprising nozzle means intendedfor fixing to the inside wall of said pan or bowl, and narrow-bore tubemeans defining said outlet passage from said chamber to said nozzlemeans.
 6. A transportable chemical closet as defined in claim 2, whereinsaid further conduit means extends within the interior of said pan orbowl in the region of said closure means, and is provided with aplurality of inlets communicating said further conduit means with saidinterior, which inlets are so dimensioned as to allow entry of liquidtherethrough substantially only when suction is applied to said furtherconduit means.
 7. A transportable chemical closet as defined in claim 4,wherein said tube extends within the interior of said pan or bowl in theregion of said closure means, and is provided with a plurality of inletscommunicating said tube with said interior, which inlets are sodimensioned as to allow entry of liquid therethrough substantially onlywhen suction is applied to said tube.
 8. The transportable chemicalcloset as defined in claim 1, wherein said means defining the inletpassage is provided with valve means for normally closing said inletpassage, and which is in operative association with said fluidwithdrawing means whereby it can only be opened when said fluidwithdrawing means is operating, and which valve means, when open,provides an entrance to said means defining the inlet passage, which isinsufficient to allow passage therethrough of the solid waste material,but permits liquid to pass therethrough.
 9. The transportable chemicalcloset as defined in claim 8, wherein said fluid withdrawing means isprovided with means to render it operable only when said valve means isopened.
 10. The transportable chemical closet as defined in claim 8,wherein said valve means comprises a cylindrical housing having anopening therein and constituting at least part of said inlet passage, apiston member reciprocably displaceable in said housing, to open andclose said opening in dependence upon the position thereof, a cam memberpositioned to act on said piston member, further comprising means forrotating said cam member, and resilient biasing means against the actionof which said piston member is displaced by said cam member.
 11. Thetransportable chemical closet as defined in claim 8, wherein said fluidwithdrawing means is provided with means to render it operable only whensaid valve means is opened, the latter comprising a cylindrical housinghaving an opening therein and constituting at least part of said inletpassage, a piston member reciprocably displaceable in said housing, toopen and close said opening in dependence upon the position thereof, acam member positioned to act on said piston member, and causedisplacement of the latter, further comprising means for rotating saidcam member, and resilient biasing means against the action of which saidpiston member is displaced by said cam member. .Iadd.
 12. A sanitarycloset comprisinga. a bowl portion having a bottom outlet, b. a wastereceptacle positioned below said bowl for receiving liquid and solidwaste admitted to said bowl and passing through said bottom outlet, c.closure means operable between open and closed positions for selectivelypermitting solid and liquid waste to pass from said bowl to said wastereceptacle, d. means defining a separate reservoir for flushing fluid,said reservoir being positioned above said bowl outlet and around saidbowl portion, e. sump means positioned below said bowl outlet and aboutsaid waste receptacle for collecting flushing fluid when said closuremeans is closed, f. means defining a separate flow path for saidflushing fluid from said bowl to said sump when said closure means is ina closed position, thereby bypassing said waste receptacle, g. pumpmeans for forcing said fluid from said reservoir to said bowl to flushsaid bowl, said means also defining a separate flow path to return saidflushing fluid from said sump to said reservoir. .Iaddend.